pg_receivewal, pg_recvlogical: allow canceling initial password prompt.

Allow psql's other uses of simple_prompt() to be interrupted by ^C.

Provide a variant of simple_prompt() that can be interrupted by ^C.

Make psql's \password default to CURRENT_USER, not PQuser(conn).

contrib/sslinfo needs a fix too to make hamerkop happy.

Second attempt to silence SSL compile failures on hamerkop.

Blind attempt to silence SSL compile failures on hamerkop.

plpgsql: report proper line number for errors in variable initialization.